Saved Bookmarks
| 1. |
The lateral surface area of a cylinder is 94.2 cm2 and its height is 5cm. Find(i) the radius of its base and(ii) its volume. (Take π = 3.14) |
|
Answer» It is given that Lateral surface area of a cylinder = 94.2 cm2 Height = 5cm (i) We know that Lateral surface area of cylinder = 2 πrh By substituting the values 94.2 = 2 × 3.14 × r × 5 On further calculation r = 94.2/ (2 × 3.14 × 5) So we get r = 3cm (ii) We know that Volume of a cylinder = πr2h By substituting the values Volume of a cylinder = (3.14) × (3)2 × 5 So we get Volume of a cylinder = 141.3 cm3 |
|